IBasicVideo::get_AvgTimePerFrame method (control.h)
The get_AvgTimePerFrame method retrieves the average time between successive frames.
Syntax
HRESULT get_AvgTimePerFrame(
[out] REFTIME *pAvgTimePerFrame
);
Parameters
[out] pAvgTimePerFrame
Pointer to a variable of type REFTIME that receives the average frame time, in seconds.
Return value
Returns an HRESULT value.
Remarks
This method returns the authored time per frame. This value is typically set by the source filter, which obtains it from information in the video stream itself. This value is not necessarily equal to the actual time per frame at which the video is rendered.
To retrieve the actual frame rate during playback, use the IQualProp::get_AvgFrameRate. For more information on actual versus authored frame rates, see the Remarks section for the VIDEOINFOHEADER structure.
Requirements
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | control.h (include Dshow.h) |
| Library | Strmiids.lib |